Fuel-gas mixer.



W. O. ALTMAN.

FUEL GAS MIXER.

APPLIOATION FILED JULY 5, 1911.

1,053,143, I Patented Feb. 18, 1913.

unrrn STA1Zl EiENT orricn.

WILLIAM O. AL'lll/IAN, OF KANEiPENNSYLVANIA, ASSIGNOR OF ONE-FOUR'ITH TOJOHN A. JOHNSON, OF KANE, PENNSYLVANIA.

FUEL-GAS MIXER.

Specification of Letters Iatent.

Patented Feb. 1 8, 1912?.

Application filed July 5, 1911. Serial m. 637.003;

To all whom it may concern: I

Be it known. that I, VVlLLIAM O. Amara), a citizen of the United States,residing at Kane, in the county of McKean and State of Pennsylvania,have inve'nted'certain new and useful Improvements in Fuel-GasMiiiers,of which the following is a specification.

This invention relates to an improved apparatus for comminglingatmospheric air in proper proportions with hydro-carbon gases naturallyor artificially generated, before the fluid reaches the combustionchamber of the furnace or boiler;

One of the principal objects of this invention is to provide a manner ofmixing the air and gas so that the complete combustion as well as themaximum amount of heat is produced.

One of the difiiculties experienced with the mixers now-in common use isto acquire and maintain the right amount of air for proper combustion,and to introduce it into the mixing chamber in 'such manner that correctii'itermingling may be had of the and air before it reaches the point.of ignition.

Another object of this invention is to improve and simplifythe-production and operation of devices of this character, so as to becomparatively simple and inexpensive to manufacture well as reliable andefficient in use. and readily attached and'cmployed with any standardburners now in common use. I 1

Vith these objects in View the various novel features of constructionand arrangement of parts will be hereinafter more fullydescribcth'reference being had to the accompanying drawings forming apart of this specification in which:

Figure 1, is a top plan view of the device embodying the invention. vFig. 2, is a longitudinal scct-ion of the same device. Fig. 3, is a viewof the mixer from the con'ihustion cud. Figfil. is anend View of thereducer showing the air portsf Referring to the drawings, 1, is a burnertube having a series of perforations oo spaced apart. thcreom which tubcextends into the combustion chamber of a stove or furnace, 2 is a cap orreducer which is screw threaded to receive the end of the burner tube.in the center of the cap or reducer i2, is an aperture 8, screw threadedto receive the feed tube 3, which tube projects through the reducersufliciently to engage the interior reducer 4, whose opposite or reducedend is screw threaded to receive the distributing tube 5.

Located around the central aperture in the cap or reducer 2, are airports"6-(S designed to introduce a proportionate amount of air to theamount of gas introduced. The method of commingling the same will bemore fully described.

The distributing tube 5, extends well into the interior of the burnertube 1. and has in its internal end, an opening of novel constructionwhich constitutes an important feature of this invention. comprising asit does longitudinal V shaped slots 7. shown in Fig 2. said slots havingproperties which produce novel results in their functions ofintermingling the gas emitted therethrough, with atmospheric airintroduced into the burner tube through the air ports 6-6.

By the adoption of the novel form of aperture in the discharge end ofthe distributing tube, comprising as it does la tcral V shaped slitscut, into the sides of the tube, I am able to produce a commingling ofthe gas with the air which is most etfective in producing a mixturecapable of the highest state of combustion. Furthermore as the mixtureof gas and air is consumed, there is produced a siphonetic action whichdraws in the air through the air ports. and in its kinetic action pastthe V shaped slits in the distributing tube itv has the effect ofdrawing out the gas from the novel aperture of the discharge end of thedistributing tube, causing a discharge therefrom independent of thepressure maintained in the gas mains.

In the developments of my improved form of air mixer, have evolvedauneans of bringing the air and gas into proper assimilation to create amixture of highest combustion. due to the proportion at which Iintroduce the element of gas and air sepz ratcly, and the novel form oftheaperture oft-he tube from which the gas is omitted. I have found thatin combining atmospheric air with hydro-carbon gases. and moreparticularly with natural gas, thatthe proportion of air should beeleven and one'half parts to one part of hydrr-carb m gas. That toacquire these. results I provide air ports 6 -6 of such size, that theircombined area will be eleven times the area of the distributing tube 5.This proportion with my novel form of slots leading from the aperture inthe distributing tube, tends to maintain, under varying degrees ofpressure at which illuminating and heating gas is usu ally delivered,the proper proportion of air and gas, to secure the highest possiblecombustions.

In the construction of my apparatus it will be observed that thedistributing tube is of generous proportions, which eliminates thevariations of gas flow due-to high or low pressure of gas when a smallaperture for distributing the gas is used, and my improved form of mixerwill operate equally well on high or low pressure there being no unduedraft of air through the air ports due to the effect of a blast of gascoming from a small aperture.

While I have found that the proper ratio of: air to natural gas to makeperfect combustion is eleven to one, this can be increased to twelve toone, Without affecting materially the combustion, but to exceed thatratio, will be detrimental to the combustion and materially lessen theheat of the flame produced thereby. On the other hand with a diminishedamount of vair below the proportion of eleven and one half to one thereis a production of carbon and a state of improper combustion.

I donot Wish to limit myself to the specific form of apparatus hereindescribed, as my apparatus may be made in other. forms and designsWithout departing from the spirit of my invention.

Having thus described my invention What I claim is: D

1. A gas mixer having a cylindrical mixing chamber, a plurality of airinlets thereto, and a gas inlet comprising a tube extending into themixing chamber having V shaped slots placed in the outlet end providingmeans for introducing the gas in said mixing chamber between the airinlets and points of ignition.

2. A gas mixer comprising a cylindrical mixing chamber, a gas tubeextending into said mixing chamber, forming an, annular flue betweensaid tube and the Walls of the mixing chamber, means for introducing airinto said flue, and means comprising V shaped slots placed in the innerend of the gas tube for commingling gas with the air as it passes fromsaid annular fiue into the mixing chamber.

In testimony whereof I have afiixed my,

signature in presence of two Witnesses.

' WILLIAM o. ALTMAN.

Witnesses PAUL KUHNE, G., W. BERRY.

